INDEX TO VOLUME If. 



MACKIE. S. J. 



Mackic, H. J., sheathing zinc, to pre- 

 serve iron ships from corrosion 

 iind fouling, discussion of paper 

 by, 308-311. 

 Magnetic ore, dip of needle over 



only natural, 339. 

 Manchester Corporation test of 



water-meters, 280. 

 Marine boilers, construction applic- 

 able to, 392 : high-pressure steam 

 for, 389. 



Martin. E.. process of melting steel 

 scrap in regenerative gas furnace, 

 307. 



Mass, specific gravity, weight, rela- 

 tions of, 306. 



Materials, breaking strain of, 315 ; 

 and limit of elasticity of. reference 

 to, 315. 



Mathematical investigation of terres- 

 trial attraction. 300-3(51. 

 Mathematics, use of and abuse of. 



402. 

 Mayer's meteoric hypothesis of the 



sun's conservation, 424. 

 Mead's bucket water-meter. 270 ; 



description of, 277. 

 Mechanical methods of refrigeration. 



326. See Refrigeration. 

 Mercury expansion, Regnault's ex- 

 periments on, 368. 

 Metal permanent way on the Con- 

 tinent, 4 Hi. 

 Metallic iron by deposition from 



soluble sulphates, 338. 

 Metals, change of density with 

 change of physical conditions, 409. 

 Metre, scale, ease of working with, 



305 ; verification of, 306. 

 Metropolitan Railway, Siemens's, 

 C. W.. proposed remedy for pre- 

 vention of emission of products of 

 combustion on, 356, 357. 

 Mild steel reaches elastic limit sooner 



than hard, 407. See. 8teel, Mild. 

 Millimetre and fraction of inch com- 

 pared as standards. 305. 



PATENTS. 



Millimetres, subdivisions of. 305. 



Mining purposes, machinery for, 298. 



Moucvieff, Major, hydraulic recoil 

 recommended by, for guns. 332. 



Morrison, G. J., railway tunnels, 

 ventilation and working of, dis- 

 cussion of paper, 356-357. 



XEWTOX. gases in space, 426, and 

 radiation, views regarding, 434 ; 

 (to-rtxti-ial attraction. 358 ; effect 

 of latitude on, 372). 



New York bridge, steel for, 398, 399. 



OPTICAL apparatus for lighthouses. 



311. 

 Ordnance, construction of. K"2 ; 



(/shrinkage strains applied to. 



102 ; tube deformed by too much. 



403 ;) Woolwich system of, 402. 



PAUET, criticism of high-pressure 



vessels. 390. 

 ! Parkinson's water-meter, 277, 288. 



Patent bill, Society of Arts, 414 : 

 worked out by Sir F. B ram well, 

 just and equitable. 415. 



Patent Congress at Paris and Vienna. 

 415 ; at Vienna, 341. 



Patent, duration of, 422. 



Patent law. 344 ; discussion of, 344- 

 345 ; English, valuable, 344 ; 

 German, 342 ; necessity for. 344. 



Patent Law Amendment Bill, dis- 

 cussion of, 418-423. 



Patent Office should supply trust- 

 worthy information regarding 

 patents, 420. 



Patent and real property compared, 



421. 

 i Patent, temporary endowment, 421. 



Patent, a trust, 422. 



Patents and compulsory licenses. 

 422 : (f.iretminatimi of advantages 



